Electromagnetic nut conveying gun

Abstract

The embodiment of the utility model provides an electromagnetic type nut conveying gun which comprises a material receiving seat assembly, a material conveying assembly and a material conveying assembly, wherein the rear end of the material receiving seat assembly is connected with a connector assembly; an electromagnetic coil is arranged in the connector assembly; the ejector rod assembly is connected to the rear end of the connector assembly and comprises an ejector rod protection sleeve and an ejector rod arranged in the ejector rod protection sleeve. The rear end of the ejector rod assembly is connected with an air cylinder. And a piston of the air cylinder is connected with the ejector rod, so that the top of the ejector rod can reach the interior of the material receiving seat assembly. A nut is attracted through an electromagnet, the problem that when a traditional nut conveying gun conveys the nut, the nut is pushed to the designated position through an air cylinder, and the nut cannot fall into the designated position easily is solved, and meanwhile the phenomenon that the nut is brought back and the conveying ejector rod is magnetized permanently due to different welded materials of a single-electromagnetic-coil nut conveying gun is avoided; and meanwhile, the nut conveying angle accuracy and speed of the nut conveying gun are improved.

Description

Technical Field

[0001] This utility model relates to the field of automation technology, and in particular to an electromagnetic nut delivery gun. Background Technology

[0002] With the continuous development of industrial technology, automation is gradually replacing manual labor, greatly improving production efficiency and reducing costs. Among them, the nut gun, as an automated tool for delivering nuts, plays an important role in improving the manual placement of nuts.

[0003] Traditional nut feeders rely primarily on inertia and a single electromagnetic coil to push the nut to the predetermined position using a cylinder. However, this method is prone to errors due to variations in air pressure, welding materials, and the permanent magnetization of the push rod, preventing the nut from reaching the intended position. Therefore, this invention proposes an electromagnetic nut feeder to at least partially address the problems inherent in the prior art. Utility Model Content

[0004] In view of the above problems, the present invention provides an electromagnetic nut delivery gun that overcomes or at least partially solves the above problems.

[0005] To address the aforementioned problems, this utility model discloses an electromagnetic nut delivery gun, comprising:

[0006] The receiving base assembly has a connector assembly connected to its rear end and a stop door at its front end; the connector assembly contains an electromagnetic coil.

[0007] A push rod assembly, which is connected to the rear end of the connector assembly, includes a push rod protective sleeve and a push rod placed therein;

[0008] The rear end of the push rod assembly is connected to a cylinder; the piston of the cylinder is connected to the push rod, so that the top of the push rod can reach outside the receiving seat assembly;

[0009] Furthermore, during the extension and retraction of the top rod, it passes through the magnetic field formed by the first coil and the second coil.

[0010] Optionally, the electromagnetic coil includes a first coil and a second coil arranged side by side, and the top diameter of the coil is not greater than the inner diameter of the nut to be delivered.

[0011] Optionally, a wear-resistant copper sleeve is further provided in the connector assembly between the electromagnetic coil and the receiving seat assembly.

[0012] Optionally, the connector assembly is further provided with a cable bundle box, and the electrodes of the first coil and the second coil extend into the cable bundle box.

[0013] Optionally, the top rod assembly is fitted with a rotatable and adjustable gun support.

[0014] Optionally, a feed tube support is provided between the push rod assembly and the cylinder.

[0015] Optionally, a cylinder buffer sleeve is also provided inside the push rod assembly at the location where the cylinder and the push rod assembly are connected.

[0016] Optionally, the receiving seat assembly has a stop at its front end, and a return spring connected thereto is also provided at the stop position.

[0017] The embodiments of this utility model have the following advantages:

[0018] The receiving base assembly has a connector assembly connected to its rear end. The connector assembly contains an electromagnetic coil. A push rod assembly, connected to the rear end of the connector assembly, includes a push rod protective sleeve and a push rod housed within it. A cylinder is connected to the rear end of the push rod assembly. The piston of the cylinder connects to the push rod, allowing the top of the push rod to reach into the receiving base assembly. The cylinder extends the conveying push rod, and simultaneously, the first electromagnetic coil is energized to generate electromagnetic force that attracts the nut. Once the nut reaches the predetermined position, the first electromagnetic coil is deactivated, activating the second electromagnetic coil. The nut is then actively, accurately, and reliably delivered using a counter-magnetic field. This solves the problems of traditional nut conveying guns, where the nut is pushed out of the gun using only a cylinder push rod and then relies on inertia to reach the predetermined position, often resulting in the nut not landing at the intended location. It also addresses the issue of single-coil nut conveying guns not being able to actively demagnetize, leading to permanent magnetization of the push rod and the nut being pulled back when encountering a magnetically repulsive workpiece. Furthermore, it resolves the issues of conveying angle and speed. It can accurately feed nuts to the predetermined position (locating pin) at angles of 0-90° or 0° (traditional methods can only feed nuts at 35-70°). This is crucial for the stable operation of nut spot welding robot workstations. Furthermore, when used in manual lines at maximum speeds, it can also increase production efficiency. Because 1-N magnetic switches can be added to the cylinder of the nut feed gun, safe feeding can be ensured, while also preventing damage to the push rod due to cylinder failure. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the electromagnetic nut delivery gun of this utility model;

[0020] Figure 2 This is a schematic diagram of an embodiment of an electromagnetic nut delivery gun according to this utility model.

[0021] The attached diagram is described below:

[0022] 1. Material receiving seat assembly; 2. Connector assembly; 3. Push rod assembly; 4. Cylinder; 5. Gun support; 6. Material tube bracket; 101. Stop gate; 201. Cable bundle box; 202. Wear-resistant copper sleeve; 203. First coil; 204. Second coil; 301. Push rod protective sleeve; 302. Push rod; 303. Push rod buffer sleeve; 401. Cylinder buffer sleeve. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figure 1 This diagram illustrates a structural schematic of an embodiment of the electromagnetic nut delivery gun of the present invention, comprising: a receiving base assembly 1, the rear end of which is connected to a connector assembly 2; the connector assembly 2, wherein a first coil 203 and a second coil 204 are arranged side by side, the two coils having opposite magnetic fields when energized; a push rod assembly 3, which is connected to the rear end of the connector assembly 2; the push rod assembly 3 includes a push rod protective sleeve 301 and a push rod 302 disposed within the push rod protective sleeve 301; the rear end of the push rod assembly 3 is connected to a cylinder 4; the piston of the cylinder 4 is connected to the push rod 302, so that the top of the push rod 302 can reach the target position outside the receiving base assembly 1 to which the nut needs to be delivered; and during the extension and retraction of the push rod 302, it passes through the magnetic field formed by the first coil 203 and the second coil 204. The aforementioned nut delivery gun, incorporating dual electromagnetic coils, effectively attracts metal nuts using electromagnetic force. This solves the problem of traditional nut delivery guns, which rely solely on a cylinder pusher to move the nut to a predetermined position, often resulting in it not landing at the intended location. The nut delivery gun incorporates two electromagnetic coils that generate opposite magnetic fields. These coils are wound in opposite directions or connected in reverse order, allowing them to produce opposing magnetic fields. Specifically, the first coil 203 and the second coil 204 are each connected to a control element, such as a relay, and are controlled by these elements. These control elements include, but are not limited to, relays; they can also be optocouplers, MOSFETs, transistors, or combinations thereof integrated on a control board.

[0025] During operation, the conveying gun controls the working sequence through external devices, such as a PLC or other control units. Specifically, when the nut falls into the receiving seat assembly 1, while controlling the push rod 302 to push the nut outward, the first coil 203 is energized so that the nut is attracted to the top of the push rod 302. After the push rod 302 delivers the nut out of the receiving seat assembly 1, the first coil 203 is kept energized to maintain the attraction force until the push rod 302 is about to deliver the nut to the predetermined position, at which point the energization of the first coil 203 is disconnected. At this time, the second coil 204 is energized, so that the push rod 302 generates an opposite magnetic field, which pushes the nut to the predetermined position through magnetic force and controls the push rod 302 to retract. During this process, since the magnetic field of the second coil 204 is opposite in direction to the magnetic field generated by the first coil 203, the magnetic field generated by the second coil 204 can not only accurately push the nut to the target position, but also demagnetize the push rod 302. The magnetization process occurs because during the ejection process, the ejector rod 302 is magnetized by the electromagnet effect formed by the first coil 203. During the retraction process, the second coil 204 further demagnetizes the ejector rod 302 through a opposite magnetic field, preventing the ejector rod 302 from becoming magnetized over time, affecting nut pushing, and preventing it from aging easily. Utilizing electromagnetic force to attract the metal nut overcomes the shortcomings of traditional nut delivery guns that rely solely on the cylinder 4 for pushing and inertia for nut delivery, greatly improving the accuracy of nut delivery to the predetermined position and significantly improving the problem of traditional nut guns often failing to reach the intended position.

[0026] By using the aforementioned dual electromagnetic coils in conjunction with the push rod, the problem of single-rod pushers being susceptible to external forces or instability due to inertial pushing is not only solved—for example, when the cylinder's air pressure is unstable, leaks, or the cylinder itself or its components cause changes in pushing speed or force, resulting in unstable force and / or speed when a single push rod (or pusher) pushes the nut out, thus preventing the nut from accurately falling into the predetermined position—is also addressed. Furthermore, single push rods, or those combined with a single magnetic structure, limit the inertial transport of the nut to relatively flat working environments. For instance, when the output port of the delivery gun faces... When the nut is pointing downwards or at a large downward angle, it may fall off due to its own weight after entering the receiving seat assembly 1. However, in this application, the nut is still attracted after it is output from the receiving seat assembly 1. When it is close to the target position, the magnetic field direction is switched, and the nut is pushed into the target position under the action of the reverse magnetic force. It is not affected by the orientation of the equipment, nor by the thrust and speed of the cylinder. This avoids the nut not falling into the predetermined position accurately due to insufficient or unstable air pressure when the cylinder supplies air. The push rod 302 demagnetizes after each operation, which can greatly extend its service life.

[0027] It should be noted that the electromagnetic nut described in this application is suitable for nuts that can be attracted by a magnetic field, such as nuts made of iron or silicon steel, but not for nuts made of materials that cannot be attracted, such as aluminum nuts. Through the synergistic effect of the opposing magnetic field force of the dual electromagnets combined with the thrust of cylinder 4, it not only solves the problem that traditional nut guns, whether based on inertia or single electromagnets or permanent magnets, cannot accurately control the timing of nut drop (since single electromagnets, whether permanent or electromagnetic, cause the nut to be passively attracted), but also generates controllable electromagnetic attraction by directly acting on the metal nut through dual electromagnetic coils. When the nut is sent out by the conveyor rod, the nut can be actively attracted and guided during the pushing process through the transformation of magnetic attraction, solving problems such as inertia, demagnetization, and premature detachment. This not only ensures that the nut maintains the correct posture after falling, but also actively attracts and guides during the pushing process, solving the problem of displacement or detachment caused by inertial instability. Through the synergistic effect of electromagnetic force and the thrust of cylinder 4, when the push rod 302 is in place, it switches to pushing the nut with an opposing magnetic field, achieving precise control of the top of the push rod 302.

[0028] It should also be noted that, as a metal component, when the metal nut falls into the receiving seat assembly 1 and is located in the energized electromagnetic coil, it can form part of an electromagnet. If it were a single electromagnet, the push rod 302 and the nut would be located within the coil, forming the core of the same electromagnet. However, in this application, the push rod 302 and the nut are located in different coils due to the two parallel coils, and since the push rod 302 is a single, integral structure, it is equivalent to two electromagnets. Furthermore, it should be noted that the opposite magnetic fields mentioned in this application refer to the direction of the magnetic fields, not the opposite poles. For example, if the S poles or N poles of two magnets are placed opposite each other, the directions of their magnetic fields are opposite, but the same magnetic poles are opposite. The working principles of the relays, transistors, and other components described above, and their use in controlling other components, are all prior art and will not be elaborated upon here.

[0029] In one embodiment of this application, the connector assembly 2 contains an electromagnetic coil and a wear-resistant copper sleeve 202, with the hollow wear-resistant copper sleeve located on one side of the receiving seat assembly 1. The electromagnetic coil includes a first coil 203 and a second coil 204 arranged side-by-side, the first coil 203 and the second coil 204 being electromagnetic coils of the same specification. The push rod 302, at least its top, is made of a low-coercivity material, and its top diameter is not larger than the inner diameter of the nut to be conveyed, allowing the nut to be inserted into the top position of the push rod 302, thereby making the nut push more stably. For example, soft iron has high magnetic permeability and is suitable as a magnetic core material. Low-coercivity materials can be rapidly demagnetized after the external magnetic field is removed. Soft magnetic materials include, for example, pure iron, low-carbon steel, silicon steel, etc.

[0030] Furthermore, within the connector assembly 2, a wear-resistant copper sleeve 202 is located between the electromagnetic coil and the receiving seat assembly 1. The wear-resistant copper sleeve 202 reduces frictional loss between the electromagnetic coil and the receiving seat assembly, extending the equipment's service life. It also optimizes the electromagnetic conduction path, enhancing the electromagnetic force's effect on screw attraction and pushing, thus helping the screw reach its predetermined position more accurately.

[0031] It should be noted that while copper cannot completely isolate magnetic forces, it can weaken their influence. When the electromagnetic coil is operating, a magnetic field still exists at the location of the wear-resistant copper sleeve 202. When the push rod 302 passes through this sleeve, the free electrons within it experience a force, generating a current. This current produces a magnetic field opposite to the original magnetic field. Essentially, when the push rod 302 pushes the nut, the two magnetic fields generated by the wear-resistant copper sleeve 202 and the coil cancel each other out, weakening the coil's magnetic field and preventing an excessively strong magnetic field from affecting the nut's movement.

[0032] In one embodiment of this application, a cable tie box 201 is further provided on the outside of the connector assembly 2, and the electrodes of the first coil 203 and the second coil 204 extend into the cable tie box 201. The cable tie box 201 facilitates centralized management and wiring of the electrodes of the first coil 203 and the second coil 204, preventing short circuits or signal instability caused by external interference, simplifying equipment maintenance complexity, and thus ensuring the stability and accuracy of the screw conveying process.

[0033] In one embodiment of this application, a rotatable and adjustable gun support 5 is fitted around the outer periphery of the push rod assembly 3. This support can be used to install and fix the aforementioned electromagnetic nut delivery gun. The rotatable and adjustable gun support 5 allows the electromagnetic nut delivery gun to be axially adjusted, particularly to adjust the receiving seat assembly 1 to a suitable position for receiving and feeding materials. This facilitates precise adjustment of the receiving seat assembly 1 to the appropriate receiving and feeding position, enabling dynamic adjustment of the receiving direction according to working conditions. This improves the adaptability of the equipment to different working scenarios and enhances installation efficiency in complex spatial environments.

[0034] Furthermore, a feed tube support 6 is provided between the push rod assembly 3 and the cylinder 4. The feed tube support 6 supports the push rod assembly 3 and the cylinder 4, and the feed tube support is rotatable and adjustable. The feed tube support 6, through an adjustable and stable connection, disperses stress between the push rod and the cylinder, reduces vibration and displacement, and enhances stability during long-term operation.

[0035] In one embodiment of this application, a cylinder buffer sleeve 401 is further provided inside the push rod assembly 3 at the connection position between the cylinder 4 and the push rod assembly 3. A push rod buffer sleeve 303 is provided between the push rod assembly 3 and the cylinder 4, located inside the push rod assembly 3 and sleeved on the push rod 302. Through the aforementioned cylinder buffer sleeve 401 and push rod buffer sleeve 303, the instantaneous impact force of the reciprocating motion of the piston of the cylinder 4 and the push rod 302 is absorbed, reducing mechanical fatigue wear and ensuring accuracy consistency under high-frequency pushing conditions.

[0036] In one embodiment of this application, the receiving seat assembly 1 has a stop gate 101 at its front end, and a return spring (not shown in the figure) connected to the stop gate 101 is also provided thereto. The aforementioned electromagnetic coil solves the problem of the nut jumping under impact force; the stop gate 101 prevents the nut from flipping or misaligning. The stop gate 101, in conjunction with the receiving seat assembly 1, restricts the nut's flipping or misalignment, ensuring that the nut will not flip or misalign within the receiving seat, further ensuring that the nut can be correctly delivered to the target position. The stop gate 101 connected to the return spring allows the stop gate 101 to quickly return to its original position after the screw is delivered, maintaining the stability of the internal structure of the equipment, ensuring the continuity of the screw delivery process, and preventing the screw delivery trajectory from being affected by abnormalities in the stop gate 101, thus helping the screw to accurately fall into the predetermined position. Furthermore, it can also prevent secondary displacement or foreign object intrusion caused by delayed closing of the gate after the nut is pushed, improving the reliability of a single operation.

[0037] The beneficial effects of this application include: the cylinder 4 extends the conveying rod while the first electromagnetic coil 203 is energized, generating electromagnetic force to attract the nut. Once the nut reaches the predetermined position, the first electromagnetic coil 203 is disconnected, and the second electromagnetic coil 204 is activated, actively and accurately delivering the nut through a counter-magnetic field. This solves the problem of traditional nut conveying guns, where the cylinder 4 pushes the nut out of the gun, relying on inertia to push it to the predetermined position, often resulting in it not landing at the intended location. It also addresses the issue of single-coil nut conveying guns not being able to actively demagnetize, leading to permanent magnetization of the rod and the nut being pulled back when encountering magnetically repulsive workpieces. Furthermore, it solves the problems of conveying angle and speed. It can accurately convey the nut to the predetermined position (positioning pin) at angles of 0-90° or 0° (traditional methods only allow 35-70° conveying). This is crucial for the stable operation of the nut spot welding robot workstation. Additionally, if used in a manual line at maximum speed, it can also increase production efficiency. Because 1-N magnetic switches can be added to cylinder 4 of the nut delivery gun, safe delivery can be achieved, while ensuring that the push rod will not be damaged due to cylinder 4 failure.

[0038] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0039] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0040] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0041] The electromagnetic nut delivery gun provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electromagnetic nut conveying gun, characterized by, The utility model relates to a nut conveying device, comprising: a receiving seat assembly, the rear end of which is connected with a joint assembly; the joint assembly is provided with a first coil and a second coil side by side in it, and the two coils have opposite magnetic fields when electrified; a top rod assembly, which is connected to the rear end of the joint assembly and comprises a top rod protective sleeve and a top rod arranged in the top rod protective sleeve; the rear end of the top rod assembly is connected with a pneumatic cylinder; the piston of the pneumatic cylinder is connected with the top rod, so that the top of the top rod can reach outside the receiving seat assembly; and the top rod passes through the magnetic fields formed by the first coil and the second coil during the extension and retraction of the top rod.

2. The electromagnetic nut conveyor gun of claim 1, wherein The first coil and the second coil are electromagnetic coils of the same specification; at least the top of the top rod is made of a material with low coercivity, and the caliber of the top of the top rod is not greater than the inner diameter of the nut to be conveyed.

3. The electromagnetic nut conveying gun according to claim 2, characterized in that A wear-resistant copper sleeve is arranged in the joint assembly between the electromagnetic coil and the receiving seat assembly.

4. The electromagnetic nut conveyor gun of claim 2, wherein, A wire binding box is further arranged outside the joint assembly, and the electrodes of the first coil and the second coil extend into the wire binding box.

5. The electromagnetic nut conveyor gun of claim 1, wherein, A rotatable adjustable gun support is arranged around the top rod assembly.

6. The electromagnetic nut conveyor gun of claim 1, wherein, A material pipe support is arranged between the top rod assembly and the pneumatic cylinder.

7. The electromagnetic nut conveying gun according to claim 6, characterized in that A pneumatic cylinder buffer sleeve is further arranged in the top rod assembly at the position where the pneumatic cylinder is connected with the top rod assembly.

8. The electromagnetic nut conveyor gun of claim 1, wherein, The front end of the receiving seat assembly is provided with a door; the position of the door is further provided with a reset spring connected with the door.

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